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Maths Puzzle
If log 2 = 0.3010 and log 3 = 0.4771 then the value of log 4.5 is:
(a)0.6532 (b)0.7727 (c)0.3266 (d)0.3796 (e)none of these
Read Solution (Total 4)
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- (a)0.6532
log 3 + log 3 = log (3*3) ->log 9 = 0.4771 + 0.4771 = 0.9542
now
log 9 - log 2 = log (9/2) =log 4.5
-> log 4.5 = 0.9542 - 0.3010 = 0.6532
this too is a repeated question - 14 years agoHelpfull: Yes(2) No(1)
- 4.5 = 9/2= (3^2)/2
Taking log of both sides,
log 4.5 = 2 log 3 - log 2 = 2*0.4771-0.301 = 0.9542-0.3010= 0.6532 - 14 years agoHelpfull: Yes(2) No(0)
- log4.5
=log(45/10)
=log(9/2)
=log9-log2
=log3^2-log2
=2log3-log2
=(2*.4771)-.3010
=.6532 so ans is(a). - 14 years agoHelpfull: Yes(2) No(1)
- log3+log3=log9;
log9-log2=log4.5;
0.9542-0.3010=0.6532
- 14 years agoHelpfull: Yes(1) No(0)
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